Sanders campaign manager on momentum heading into Wisconsin, New York
Democratic presidential candidate Bernie Sanders is hopeful he will win today's Wisconsin primary before focusing on the New York primary on April 19. Sanders is leading in a CBS News battleground tracker poll by 2 points over rival Hillary Clinton. This comes after a string of victories for the Sanders campaign in recent weeks. With more on the Sanders campaign's newfound momentum, his campaign manager Jeff Weaver joins CBSN.